CN1214199A - Slope neutralizer for poultry watering systems - Google Patents
Slope neutralizer for poultry watering systems Download PDFInfo
- Publication number
- CN1214199A CN1214199A CN98120872.XA CN98120872A CN1214199A CN 1214199 A CN1214199 A CN 1214199A CN 98120872 A CN98120872 A CN 98120872A CN 1214199 A CN1214199 A CN 1214199A
- Authority
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- China
- Prior art keywords
- fluid
- valve
- pressure
- supply pipe
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 244000144977 poultry Species 0.000 title claims abstract description 36
- 239000012530 fluid Substances 0.000 claims abstract description 68
- 239000007788 liquid Substances 0.000 claims description 36
- 238000006386 neutralization reaction Methods 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 230000035622 drinking Effects 0.000 claims description 10
- 230000005484 gravity Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 abstract description 5
- 230000003472 neutralizing effect Effects 0.000 abstract 1
- 230000008859 change Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000009408 flooring Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K39/00—Feeding or drinking appliances for poultry or other birds
- A01K39/02—Drinking appliances
- A01K39/0213—Nipple drinkers
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K39/00—Feeding or drinking appliances for poultry or other birds
- A01K39/02—Drinking appliances
- A01K39/0206—Drinkers especially adapted for feeding hummingbirds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/04—Check valves with guided rigid valve members shaped as balls
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Birds (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Mechanical Engineering (AREA)
- Feeding And Watering For Cattle Raising And Animal Husbandry (AREA)
- Catching Or Destruction (AREA)
- Housing For Livestock And Birds (AREA)
- Meat, Egg Or Seafood Products (AREA)
Abstract
A poultry watering system is provided which has a, series of pressure neutralizing chambers disposed at spaced intervals along the fluid conduits inside of a poultryhouse in order to maintain a preselected fluid pressure range. Each chamber includes at least one gravity-biased ball valve with a gradually increasing valve outlet orifice. Weighting elements may also be disposed to further bias the ball valves toward upstream closure. The ball elements of each valve are selected to be rotatable in response to fluid flow past it so as to create localized turbulence to break up debris entrained in the fluid. Preferably, a plurality of ball valves in parallel are disposed within each chamber. Also, each ball valve is advantageously configured such that greater pressure is required to open the valve than to keep it open.
Description
The present invention relates to the pressure regulation of fluid flow system, whether the particularly maintenance of the previously selected fluid pressure of poultry water system is no matter have horizontal slope in this environment.
In agricultural industry, the poultry water system is well-known, and all tells about in former many patents.Usually, they are used in cage, and poultry provides moisture in the culture systems and ground culture systems, and also medicine and nutriment being dissolved in water sometimes provides to poultry by them.The poultry water system usually comprises the liquid conducting pipes of arranging around whole poultry chamber interior.Drinking bowl independently, such as United States Patent (USP) 4,637,345 and 5,193, the nozzle-type drinking bowl described in 485 is coupled in the liquid transport conduit so that poultry can drink water when needed.These transport pipelines are connected to the fluid supply of pressure.
To leak and guarantee that the nozzle-type drinking bowl works effectively in order to reduce, usually must carefully regulate the fluid pressure in the transport pipeline.In addition, employed fluid pressure usually is low-down in the poultry chamber, has only several inches hydraulic pressure head.Well-known so low pressure make in valve and the fluid system parts show with high pressure generally or more under different functional characteristics.Once the someone proposed between transport pipeline and outside liquid import the fluid pressure adjuster to be installed so that reduce pressure and the compensator fluid voltage supply variation that adds fluid in the transport pipeline in the past.In the assignee's who transfers the application United States Patent (USP) 4,344,456, provided the example of this fluid pressure regulator.
But in the poultry chamber interior, particularly in the poultry feeding system of ground, fluid pressure may change in the conveyance conduit in above-mentioned pressure regulator downstream.Occurring in to this changing unit the poultry room floor has under the situation of tangible slope.In being built in the house of uneven ground, this slope is not uncommon.Please remember that the poultry chamber has hundreds of foot long usually, even ground has the very low-angle slope also can be in the change in fluid pressure that produces several feet along poultry chamber length direction.In the fluid system of other non-similar formula, several feet change in fluid pressure is difficult to note obtaining.But in the poultry chamber, this superpressure can produce condition of poor, such as owing to liquid extrude made from the standpipe other end spattered ground with water, and/or disturbed the operate as normal of nozzle-type drinking bowl, make that drinking bowl is difficult to open, the liquid that perhaps needs to provide too many could be opened.These situations have deleterious effects to poultry production.
The variation of fluid flow may can cause also that pressure changes.In the different time, such as at feeding or in hot day, indoor poultry can pass through a large amount of water of nozzle-type drinking bowl consumption.But in the weather in feeding interval and cool place, the fluid flow that is entered the nozzle-type drinking bowl by conveyance conduit can be much smaller.
Usually wish that the conveyance conduit fluid pressure keeps constant substantially, such as on the whole length of conveyance conduit, no matter the size of the indoor gradient and fluid flow, pressure is about 4 inches.There were many devices once to be installed to attempt in the carrier pipe pressure requirement that reaches above-mentioned in the past.For example, once the someone proposes the every conveyance conduit in longshore current body voltage supply adjuster downstream by the above-mentioned fluid pressure regulator of space interval installation.Though when low discharge or flow were zero, these pressure regulators can guarantee good closure, change of pressure size and filling when transporting and to regulate one by one in flow interval greatly.In specific poultry chamber, the quantity of the length of given carrier pipe and the pressure regulator that uses like this, this adjusting can be a job consuming time.And this fluid conditioner ratio will be preferably more expensive, and assembling and maintenance are more complicated.
As a kind of selection, there is the people once to propose by space interval a series of biasing spring check valve to be installed along each conveyance conduit.For example, use plunger valve as stated above, this valve comprises a spring with the flow direction horizontal aligument, and it is to impel a valve element upstream to move and a compressible rubber valve seat closure that this spring purpose is installed.If spring keeps constant compression force, this valve can be regulated fluid pressure automatically according to the different pressures of the biasing spring in each valve.But, when this valve is zero at low discharge or flow, the tendency of leakage is arranged.Even reveal slowly, it is also very big to add up on the length of whole pipe.Thereby fluid pressure can not remain on the expected value.A reason that this leakage occurs is, the spring force of the bias valve that is used for must be enough little, for example under 4 inches fluid pressures that current require valve is held open, but when not having current, the too little valve member that can not make of elastic force is enough to be pressed on the valve seat.For can when not having current, keeping better seal, still make valve member change insensitive to the fluid pressure of open valve with the big spring of elastic force.And this valve is easy to block and block because of the enter fluid that is provided and the chip that flows through conveyance conduit.
Therefore, one object of the present invention just provides an improved poultry water system.Other purpose comprises:
A. automatic a neutralization introduced the reliable method of poultry water system pressure by poultry room floor slope.
B. expensive fluid pressure compensation arrangement, it can act on the fluid flow scope that comprises zero delivery,
C. pressure-regulating device that is used for the poultry water system that under low discharge or zero delivery, is not easy to reveal,
D. negative booster of automatically regulating fluid pressure input and speed, purpose be to keep predetermined downstream liquid pressure and
E. the insensitive mechanism of decompressor of chip in the convection cell.
Above and other objects of the present invention realize in the poultry water system of a series of pressure neutralization chamber is installed, each neutralization chamber has at least one check valve upright, gravity biased, they are pressed space interval along liquid conducting pipes and install, and purpose is flow stream pressure is remained in the previously selected scope.Each check valve includes a valve outlet port hole coniform or that increase gradually.The ballast element can be installed comes further bias voltage ball valve to make it upstream closed.The ball element of each selected valve can be rotated when fluid is flowed through so that produce local turbulent flow and be broken up chip in the fluid.Preferably, a plurality of ball valves of parallel installation in each neutralization chamber.Simultaneously, advantageously, the structure of each ball valve makes opening pressure greater than the pressure that is held open state.
Those skilled in the art one clearly send out other purpose surely of the present invention when the following drawings and detailed description, advantage and novel part.
Fig. 1 shows an a kind of part of using the poultry water system of most preferred embodiment of the present invention with the mode of schematic diagram.
Fig. 2 has shown the side-looking decomposition assembling enlarged drawing of a pressure neutralization chamber of the present invention.
Fig. 3 has shown the pressure neutralization chamber assembling side cutaway view of 2-2 along the line among Fig. 2.
Fig. 4 has shown the top view of pressure neutralization chamber among Fig. 3.
Fig. 5 has shown the end-view that the pressure neutralization chamber is looked along downstream end among Fig. 3.
Fig. 6 has shown the partial sectional view after the further amplification of valve seat assembling among Fig. 3.
Fig. 1 illustrates a kind of poultry water system 10, and it is partly with a liquid delivery tube or supply pipe 12 at least, by pressure from fluid supply 13 water conservancy diversion liquid; A pressure regulator 14 that is connected the entrance place is preferentially selected United States Patent (USP) 4,344 for use, the type that elaboration is produced by the ziggity Systems company of the Middlebury of Indiana in 456.The delivery outlet of adjuster 14 is connected to towards the liquid delivery tube or the supply pipe 16 at poultry place.Nozzle-type drinking bowl 18 is pressed traditional approach and is installed according to space interval along supply pipe 16.Stay pipe 20 is installed in the poultry chamber through hoist cable.Supply pipe 16 usefulness geometrical clamps 24 are fixed on this pipe at preposition above the poultry room floor.These characteristics all are traditional in essence.
Each neutralization chamber 30 has inlet 32 that is connected to supply pipe 16 upstreams and the outlet 34 that is connected to supply pipe 16 part of lower stream.At least one is preferably two ball valve assemblies 36 and is installed in each neutralization chamber 30.For example, these assemblies are vertically installed and are parallel to each other so that the valve inlet of each assembly 38 guiding liquids stream radially flows out and upwards enters valve module from axis 28.Each valve module 36 includes a valve base element 40, and spheroid element 50 is if want to also have in certain embodiments a ballast element 60.Each chamber 30 includes a detachable crown member 70, and this element is fixed on the chamber body 72 with traditional fastenings, such as screw 73 is passed boss 74.In the circumferential groove 78 between top component 70 and chamber body 72 O-ring seals 76 is installed preferably.Chamber 30 the most handy plastic mould pressing manufacturings.
On the contrary, valve base element 40, spheroid element 50 and the 60 the most handy metal material manufacturings of ballast spare are such as stainless steel.Liquid keeps among the embodiment of 4 inches pressure drops between each neutralization chamber, and spheroid element 50 preferably diameter is about 7/16 inch ball.For example, valve base element 40 is made becket or is had a metal dish of the passage that passes of axis 42 longitudinally.Valve inlet 38 passes the passage of valve base element 40.Best valve base element 40 is made can be from the valve seat that uses the nozzle-type drinking bowl that is similar to of ziggity Systems company acquisition.
A longitudinal axis end of taper hole spare 43 upwards, the bottom is valve module 36 in and abut against installation on the valve base element 40.By such installation, taper hole spare 43 can also be located and chucking valve base element 40 except the major function that can exercise the variation of compensation fluid pressure definitely, and is when valve is in open mode, all the more so.Taper hole spare 43 is preferably made a common hollow cylinder body, axis 42 location and have one first frusto-conical surface 44 longitudinally, with axis 42 inclination angles be A; Contiguous frusto-conical surface 44, process retreat face 45 and extend to the outlet of valve module 36, and taper hole element 43 forms second frusto-conical surface 46, and it and axis 42 inclination angles are B.Angle B is more preferably greater than A.Frusto- conical surface 44 and 46 is used to form the hole or the liquid flowing channel that increase gradually that are led to neutralization chamber 30 outlets by valve base element.Taper hole spare 43 is shown as and ends at the common horizontal end face 48 that is in close proximity to napex member 70 in the present embodiment.
Spheroid spare 50 is installed in the taper hole spare 43 with seal valve seat element 40.Gravity impels it downwards near valve inlet 38.Wish have a quite big pressure drop not change again among the embodiment of neutralization chamber size or its assembly through neutralization chamber 30 at those, ballast spare 60 preferably is installed on the spheroid element 50 further by gravity it to push to valve inlet 38 and and valve base element 40 applyings as an increment.In this mode, spheroid element 50 is benefited from the same biasing force from a bigger spheroid, but this should construct the satisfied again prerequisite that is standardized as of compactness with assembly.In particularly preferred embodiment, ballast spare 60 is the disc-shaped element with awl section normally.Ballast spare 60 preferably comprises the periphery 62 at inclination angle, and following has one to be used for admitting and the fixing median plane groove 64 of ball element 50.Ball element 50 and ballast spare 60 structure purposes like this is when flow through valve inlet 38 and make 50 rotations of spheroid element when streaming spheroid element 50 of liquid.
In particularly preferred embodiment, taper hole spare 43 is made again and is had many grooves 80 in its side.For example, these troughed belts have 82 of inclined plane, and V-shaped.Thereby if terminal surface 48 does not contact with top part 70, so, fluid is imported the groove 84 of neutralization chamber 30 through groove 80 or terminal surface 48 by taper hole spare 43.In a kind of situation in back, the liquid path of flowing through changes again, in fact is perpendicular with axis 42 specifically.From groove 84, fluid can flow through restriction 86 enter the outlet 34.
The demonstration directly perceived of the pressure size that obtains by neutralization chamber 30 is provided by the transparent plastic standpipe 88 that the tube connector 89 from top part 70 extends.Can a ball float be installed with traditional approach in pipe 88 and in the degree that can measure, indicate liquid level.Top part 70 preferably also has a carriage district 90 to be used for cooperating mounting portion stay pipe 20 and stay pipe fixing neutralization chamber 30 reliably.
In use, weight is applied to biasing force on the spheroid element 50 and can be automatically offsets by slope, poultry flooring by predefined degree and cause elevated pressure in the supply pipe 16.The flaring opening of the hole part that is formed by frusto- conical surface 44,46 and inclined-plane 82 can compensate the fluid pressure that big flow causes when liquid demand is big to be changed and significant initial pressure peak value when opening of valves.When flow was zero, spheroid element 50 was by flowing with closing liquid on the present element 40 of valve seat.After closing, because the compression face that the valve element bears upstream liquid pressure reduces to make the pressure that acts on when opening again on the ball element 50 need keep its pressure when the enable possition when regime flow is arranged.Thereby, can obtain positiver sealing in order to avoid liquid is revealed through neutralization chamber 30.In addition, clearly owing to form local turbulent flow, liquid stream causes ball element 50 rotations can break up the chip that enters in the liquid.
Though these embodiment of the present invention elaborate in above-mentioned, these are only by means of chart and example.One of ordinary skill in the art will recognize that through various modifications and can both realize other embodiments of the invention.For example, if when the optimization of material behavior seems unimportant, valve base element 40 and taper hole spare 43 just can be made an element.Equally, vertically move when more remarkable, retreat face 45 and just can remove than horizontal direction at ballast spare 60.Therefore the spirit and scope of the present invention are only limited by subsequently claims.
Claims (20)
1. device that keeps predetermined fluid pressure size in the fluid pipeline, it is characterized in that comprising fluid flow according to the fluid pipeline gradient and the pipeline of flowing through, comprise that flow is zero, come fluid pressure in the automatic regulator solution body pipeline and be installed in valve gear on the fluid pipeline.
2. according to the device of claim 1, wherein in said valve gear, be equipped with attachment device and break up the entrained chip of liquid in the fluid pipeline.
3. according to the device of claim 1, wherein act on the said valve gear of gravity biased on the valve gear and make it in the closing liquid pipeline liquid stream and the additional weight that acts on valve gear is housed to increase the gravity biased of tending to close.
4. fluid pressure control device is characterized in that comprising:
A neutralization chamber that has liquid inlet and outlet,
One is installed in this indoor ball valve assembly that is used for controlling fluid pressure between the entrance and exit,
Said ball valve assembly has a spheroid element, a valve base element and a taper hole spare,
Said valve base element make be used for admitting said spheroid element and set sealing surface that a spheroid element can recline and
Said taper hole spare is made and is used for setting a flaring hole that flows to outlet for liquid from said valve base element.
5. according to the device of claim 4, wherein taper hole spare comprises one along the common hollow cylinder of Y, first conical surface that becomes first angle with axis of one end contiguous seat components set, its other end is in along the lower end of liquid stream sets second conical surface that becomes second angle with axis, and first angle is less than second angle.
6. according to the device of claim 4, wherein with respect to the spheroid element ballast spare is installed and is used for ordering about ball element and moves to potted component indoor.
7. according to the device of claim 6, wherein said neutralization chamber comprises the device that ballast spare is held in a predetermined position with respect to the spheroid element, ballast spare comprises an inner groovy in order to admit the part of spheroid element, and this layout makes the spheroid element correspondingly to rotate according to the liquid stream of the spheroid element of flowing through.
8. according to the device of claim 7, wherein said weight includes external an of garden, and the shape that the garden is external makes the hole to increase gradually.
9. according to the device of claim 6, wherein said neutralization chamber comprises a plurality of ball valve assemblies, and its quantity is determined according to desirable voltage drop value between importing and exporting.
10. poultry water system, it is characterized in that comprising a fluid source,, a fluid supply conduit, one is installed in the fluid pressure that is used between fluid supply and supply line according to from fluid supply and changes the pressure-regulating device that adjusting is provided to fluid pressure in the supply line, with many drinking bowls that according to poultry the demand of liquid provided liquid on the supply pipe for poultry that are connected to, comprise that also one is connected on the supply pipe according to fluid flow in supply pipe gradient and the pipeline, comprise when flow is zero, regulate the device of fluid pressure in the supply pipe automatically.
11. according to the system of claim 10, wherein supply pipe comprises that many interconnected pipe section have the device that the pressure unit that separates is regulated fluid pressure in the supply pipe automatically with many being installed between pipe section.
12., regulate automatically wherein that the device of fluid pressure comprises that at least one vertically is mounted to the ball-cock device of closing the liquid of the supply pipe of flowing through by gravity biased in the supply pipe according to the system of claim 10.
13. according to the system of claim 12, wherein additional weight is connected on the ball-cock device to be used to provide the additional gravity biased power of cutting out liquid stream in the supply pipe.
14. according to the system of claim 13, wherein ball-cock device comprises one towards the hole of supply pipe downstream direction opening, said hole has the advantages that to increase along supply pipe downflow direction liquid communication area.
15., wherein on indicating device is connected to the downstream unit of ball-cock device, be used to provide the apparent indication of fluid pressure in the supply pipe according to the system of claim 12.
16. according to the system of claim 12, comprising support member that is connected to supply pipe and the automatic device of regulating fluid pressure, this adjusting device has the device of locating reliably with respect to support member.
17. method that in the length range of the fluid pipeline that descending and different flow are arranged, keeps predefined liquid pressure drop, its feature is being to comprise the steps: that at first will enter into fluid pressure is adjusted into substantially invariable input pressure, raises by the pressure that a series of gravity biased valve member regulates in the fluid pipeline that is caused by the slope is installed along the fluid pipeline length direction then.
18. according to the method for claim 17, wherein in the fluid pipeline different flow to liquid the living influence of cutting down output draw from the hole of the valve member that increases along fluid pipeline downstream direction discharge area by use and offset.
19. according to the method for claim 18, wherein the pressure rise of regulating at valve member is realized by the valve number of elements of selecting valve member inside to be arranged in parallel by gravity biased.
20. according to the method for claim 19, wherein valve member should be constructed like this, opens the required fluid pressure of valve element and is in fluid pressure with the valve seat separated position greater than the maintaining valve element.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US94042197A | 1997-09-30 | 1997-09-30 | |
| US08/940,421 | 1997-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1214199A true CN1214199A (en) | 1999-04-21 |
Family
ID=25474808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98120872.XA Pending CN1214199A (en) | 1997-09-30 | 1998-09-30 | Slope neutralizer for poultry watering systems |
Country Status (8)
| Country | Link |
|---|---|
| CN (1) | CN1214199A (en) |
| DE (1) | DE19845425A1 (en) |
| ES (1) | ES2163346B1 (en) |
| GB (1) | GB2329953A (en) |
| IL (1) | IL126348A0 (en) |
| IT (1) | IT1302567B1 (en) |
| NL (1) | NL1010211C2 (en) |
| TR (1) | TR199801960A3 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19953656A1 (en) * | 1999-11-08 | 2001-05-10 | Lubing Maschf Ludwig | Device for equalizing the pressure of a liquid and method for changing the pressure equalizing ratio |
| US6553937B1 (en) * | 2002-03-12 | 2003-04-29 | Chen Hui Cheng | Water shut-off structure of a drinking device for a pet |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3724425A (en) * | 1970-05-20 | 1973-04-03 | E Thompson | Water distribution system for poultry and small animals |
| GB1524255A (en) * | 1975-09-04 | 1978-09-06 | Jwi Ltd | Automatic vacuum stabilizing valve |
| US4176679A (en) * | 1978-03-27 | 1979-12-04 | Harry Roger | Check valve |
| US4201244A (en) * | 1978-08-03 | 1980-05-06 | Leo Quirk | Auxiliary safety valve for a pressurized fluid system |
| US4448212A (en) * | 1981-05-14 | 1984-05-15 | Sterling Drug Inc. | Check valve for use with high pressure pump |
| GB2100483B (en) * | 1981-06-16 | 1985-04-24 | Yamato Scale Co Ltd | Predetermined counting |
| US4721289A (en) * | 1985-07-23 | 1988-01-26 | Rantom, Inc. | Combined check and exhaust valve for high pressure gas spring |
| US4945947A (en) * | 1989-05-26 | 1990-08-07 | Chromalloy American Corporation | Ball-type check valve |
| US5247963A (en) * | 1990-09-10 | 1993-09-28 | Ziggity Systems, Inc. | Flush apparatus for watering systems |
| US5253668A (en) * | 1993-02-18 | 1993-10-19 | G.T. Products, Inc. | Smooth-opening, low-hysteresis ball head valve |
| NL9301504A (en) * | 1993-09-01 | 1995-04-03 | Metalo Monti Vof | Apparatus and method for blocking a flow of liquid through a pipe in one direction. |
| IL120532A (en) * | 1994-05-25 | 1999-04-11 | Plasson Maagan Michael Ind Ltd | Water pressure reducer particularly for use in water supply systems for poultry houses |
-
1998
- 1998-09-24 IL IL12634898A patent/IL126348A0/en unknown
- 1998-09-25 GB GB9820972A patent/GB2329953A/en not_active Withdrawn
- 1998-09-29 NL NL1010211A patent/NL1010211C2/en active Search and Examination
- 1998-09-30 TR TR1998/01960A patent/TR199801960A3/en unknown
- 1998-09-30 IT IT1998MI002101A patent/IT1302567B1/en active IP Right Grant
- 1998-09-30 ES ES009802034A patent/ES2163346B1/en not_active Expired - Lifetime
- 1998-09-30 DE DE19845425A patent/DE19845425A1/en not_active Withdrawn
- 1998-09-30 CN CN98120872.XA patent/CN1214199A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| NL1010211C2 (en) | 2001-05-15 |
| IL126348A0 (en) | 1999-05-09 |
| DE19845425A1 (en) | 1999-05-20 |
| NL1010211A1 (en) | 1999-03-31 |
| GB2329953A (en) | 1999-04-07 |
| GB9820972D0 (en) | 1998-11-18 |
| ITMI982101A1 (en) | 2000-03-30 |
| IT1302567B1 (en) | 2000-09-29 |
| TR199801960A2 (en) | 1999-04-21 |
| TR199801960A3 (en) | 1999-04-21 |
| ES2163346A1 (en) | 2002-01-16 |
| ES2163346B1 (en) | 2003-04-01 |
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